The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 2008
Filed:
Dec. 02, 2005
David T. Hanner, Milford, MI (US);
Clyde A. Bulloch, Hartland, MI (US);
Kenneth J. Wirkner, Milford, MI (US);
Gary L. Horvat, Rochester Hills, MI (US);
David T. Hanner, Milford, MI (US);
Clyde A. Bulloch, Hartland, MI (US);
Kenneth J. Wirkner, Milford, MI (US);
Gary L. Horvat, Rochester Hills, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
The present invention provides an improved oil pan that acts as a radiated noise reduction product. More specifically, the invention addresses the case of a broad frequency forced response sound radiation for structurally rigid cast aluminum engine oil pans. The improved oil pan comprises a foam rubber isolating layer coupled to the oil pan and a urethane outer barrier layer coupled to the foam rubber isolating layer. The oil pan has side walls comprised of a plurality of differently-sized flat panels. The vibration isolation takes place locally on the oil pan surfaces, not at the attachments that connect the oil pan to the engine. The net result is a significant reduction in the oil pan radiation efficiency within the desired frequency range of 2 kHz and above.